Feature Guide

Custom Sender Domain

Send business mail from your own domain instead of the OneBob address. Register your domain, add a few DNS records, verify, and your distribution lists, document sending, and form emails go out under your own identity.

7 min read

The custom sender domain settings page with DNS records and a verified status

Overview

A custom sender domain lets your outbound business email go out from your own address (for example, hello@yourcompany.com) instead of the default OneBob address. An administrator sets it up once under Settings → Custom sender domain: register the domain, add the DNS records the email provider returns, and verify. After that, mail from distribution lists, automatic document sending, form links, and project automation carries your identity.

Verifying your domain proves to inbox providers that OneBob may send on your behalf, which improves deliverability and trust.

The records sit on dedicated subdomains, so your existing inbound email and current DNS are not affected.

A verified domain is what unlocks sending for distribution lists, automatic document sending, and company-document attachments.

The custom sender domain is a paid add-on on the Professional and Enterprise plans.

Estimated time: 15 minutes, plus DNS propagation.

Before You Begin

You need to be an administrator, and the custom sender domain add-on must be enabled for your account.

Have access to your DNS provider (where your domain is managed, e.g. your registrar or hosting control panel).

Decide which domain you want to send from and which From addresses you will use on it.

Have a real Reply-To inbox ready, an address a person actually monitors for replies.

Open the sender domain settings

Find the feature under settings and confirm it is available for your account.

1Go to Settings and open Custom sender domain.

2If you see an upgrade notice instead, the add-on is not yet active; contact us to enable it.

3The page is organized top to bottom: sending domain, DNS records, sender addresses, and a test send.

4Only administrators can register or verify a domain.

Register your sending domain

Tell OneBob which domain you send from so the provider can generate your records.

1In the Sending domain section, enter your domain (for example, example.com).

2Click Register domain. OneBob registers it with the email provider.

3The status shows as Pending and the DNS records you need appear below.

4You can only register one domain at a time; disconnect it first if you need to switch.

Add the DNS records

Copy the generated records into your DNS provider exactly as shown.

The DNS records table with type, host, value, and a copy button per row

1You will see a handful of records: an SPF record (TXT), one or more DKIM keys (TXT), and a return-path / MX record on the send subdomain.

2In your DNS provider, add each record with its exact type, host, and value; use Copy on each row, or Copy all records.

3The records live on dedicated subdomains, so your existing inbound email and any current SPF record are untouched.

4Keep host and value exact; do not add quotes, and keep any trailing dot your provider expects.

Verify the domain

Confirm the records once they are live so OneBob can start sending.

1Back in OneBob, click Verify. The provider checks your DNS for the records.

2DNS changes can take a few minutes to a few hours to propagate; use Refresh status to re-check.

3The domain shows as Verified once every record is found, and sending is unlocked.

Add sender addresses and send a test

Set the From addresses your mail uses, then confirm delivery works.

The sender addresses list and the test send form

1In Sender addresses, add a From address on your verified domain with a From name and a real Reply-To inbox.

2Mark one address as the default; it is used unless a specific flow picks another.

3Automatic out-of-office replies are suppressed by default; turn that on per address only if you want them.

4Use Send a test to email yourself a message with an attachment and confirm it arrives.

Tips & Best Practices

Add the records exactly as shown and verify in the same sitting, so you do not lose track of what is done.

If verification fails, wait for DNS to propagate and use Refresh status; most failures are just timing.

Pick a Reply-To address a person actually reads, since customer replies land there.

Fill in your Impressum under company settings, as business mail now goes out under your own identity.

A verified domain is the prerequisite for distribution lists, automatic document sending, and company-document attachments.

Need Help?

If verification will not complete or you are unsure about a DNS record, our team is happy to help: just reach out through our contact page.

Contact Support

Ready to send from your own domain?

Start a free trial and set up your custom sender domain.

Start Free Trial